From Tolkien Gateway
In the process of a language, the sundóma took part in the following phenomena:
- prefixing to a sundo its sundóma, usually together with its lengthening either in the first or in the last position.
- A infixion
- adding an a before the sundóma I creating an ohlon (diphthong):
- I/Y infixion
- putting an i/y after the sundóma creating an ohlon (less frequently occured than the previous one):